FX803 Datasheet, PDF (11/17 Pages) Sanyo Semicon Device – DC-DC Converter

Controlling Protocol ......
“Write to General Purpose Timer Register” – A/C 36 followed by 1 byte of Command Data.
H
Setting
Function/Period
MSB
76 5 4
00 0 0
Transmitted Bit 7 First
These 4 bits must be “0”
321 0
000 0
000 1
001 0
001 1
010 0
010 1
011 0
011 1
100 0
100 1
101 0
101 1
110 0
110 1
111 0
111 1
High/Extended Mid
Band
Band
Reset Timer and Start Timing
Period of
0
0
" 10 ms ±1% 20 ms ±1%
20 " 40 "
30 " 60 "
40 " 80 "
50 " 100 "
60 " 120 "
70 " 140 "
80 " 160 "
90 " 180 "
100 " 200 "
110 " 220 "
120 " 240 "
130 " 260 "
140 " 280 "
150 " 300 "
Table 7 General Purpose Timer Settings
Operation of the General Purpose Timer
This timer, which is not dedicated to any specific
function within the FX803, can be employed within the
DBS 800 system to indicate time-elapsed periods of
between 10ms and 150ms in the High/Extended Band,
20ms and 300ms in the Mid Band, to the µController.
Setting of the timer is by loading a single-byte data word
via the “C-BUS,” as indicated in Table 7 (left), to the
FX803 via the Command Data line.
The timer will be reset and the run-down started on
completion of Timer Data Word loading.
When the programmed time period has expired, the
General Purpose Timer Expired bit (Bit 2) in the Status
Register and the Interrupt (if enabled) are set.
The General Purpose Timer Expired bit is cleared:
i By a read of the Status Register, or
ii New G/P Timer information, or
iii General Reset command.
When the programmed time period has expired, this timer
will reset, restart and continue sequencing until;
i New G/P Timer information is written, or
ii A General Reset command.
The General Purpose Timer Expired bit and the Interrupt will
remain set until cleared.
This timer is set to 00_H (0ms) by a General Reset command.
Powersave
Various sections of the FX803 can be placed independently into a power economical condition. Table 8 (below) gives a brief
summary of the inactive, power-economical states available to the FX803.
Powersaved Section
Instruction Source
Table
Tone Encoder 1
Tone Encoder 2
Summing Amplifier
Table 8 FX803 Powersave Functions
Tx Tone Gen.1 Reg. (34 )
All bits = “0”
4
H
Tx Tone Gen.2 Reg. (35_H)
All bits = “0”
5
This action is automatic when both Tone Encoders are in the powersave
condition.
Powersave Conditions
Xtal/Clock and “C-BUS”: This circuitry is always active, on all DBS 800 microcircuits, under any powered/powersaved
conditions.
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